63 lines
1.5 KiB
Go
63 lines
1.5 KiB
Go
package main
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import (
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"image/png"
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"os"
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"github.com/gen2brain/raylib-go/raylib"
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)
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func main() {
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screenWidth := int32(800)
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screenHeight := int32(450)
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raylib.InitWindow(screenWidth, screenHeight, "raylib [textures] example - texture from image.Image")
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r, err := os.Open("raylib_logo.png")
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if err != nil {
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raylib.TraceLog(raylib.LogError, err.Error())
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}
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defer r.Close()
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img, err := png.Decode(r)
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if err != nil {
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raylib.TraceLog(raylib.LogError, err.Error())
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}
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// Get image size
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size := img.Bounds().Size()
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// Dynamic memory allocation to store pixels data (Color type)
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pixels := make([]raylib.Color, size.X*size.Y)
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for y := 0; y < size.Y; y++ {
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for x := 0; x < size.X; x++ {
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color := img.At(x, y)
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r, g, b, a := color.RGBA()
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pixels[x+y*size.Y] = raylib.NewColor(uint8(r), uint8(g), uint8(b), uint8(a))
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}
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}
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// Load pixels data into an image structure and create texture
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imEx := raylib.LoadImageEx(pixels, int32(size.X), int32(size.Y))
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texture := raylib.LoadTextureFromImage(imEx)
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// Unload CPU (RAM) image data
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raylib.UnloadImage(imEx)
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raylib.SetTargetFPS(60)
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for !raylib.WindowShouldClose() {
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raylib.BeginDrawing()
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raylib.ClearBackground(raylib.RayWhite)
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raylib.DrawTexture(texture, screenWidth/2-texture.Width/2, screenHeight/2-texture.Height/2, raylib.White)
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raylib.DrawText("this IS a texture loaded from an image.Image!", 285, 370, 10, raylib.Gray)
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raylib.EndDrawing()
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}
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raylib.UnloadTexture(texture)
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raylib.CloseWindow()
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}
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